---
title: "Discussion on \"A Quick Guide to Keys, JOINs, and Referential Integrity in SQL Databases.\" | Hashnode"
description: "Discussion on \"A Quick Guide to Keys, JOINs, and Referential Integrity in SQL Databases.\". SQL Keys\nKeys are essential concepts in database design. They are commonly used in JOINs to establish relationships between tables. In this article, I will explain the concept of primary keys and foreign keys, their relationship to JOINs and provide ..."
url: "https://hashnode.com/posts/a-quick-guide-to-keys-joins-and-referential-integrity-in-sql-databases/645f5c2d0ba4d870625f7b77"
---

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Discussion

# [A Quick Guide to Keys, JOINs, and Referential Integrity in SQL Databases.](https://humphreykn.hashnode.dev/a-quick-guide-to-keys-joins-and-referential-integrity-in-sql-databases?utm_source=hashnode&utm_medium=feed)

SQL Keys Keys are essential concepts in database design. They are commonly used in JOINs to establish relationships between tables. In this article, I will explain the concept of primary keys and foreign keys, their relationship to JOINs and provide ...

May 13, 2023 · 7 min read · humphreykn.hashnode.dev  
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-   [#sql](https://hashnode.com/tag/sql)
-   [#mysql](https://hashnode.com/tag/mysql)
-   [#databases](https://hashnode.com/tag/databases)
-   [#data-science](https://hashnode.com/tag/data-science)

## Written by

[Humphrey Kinoti](https://hashnode.com/@HumphreyKn)

@HumphreyKn · Nairobi

  
[View profile](https://hashnode.com/@HumphreyKn)

Data Scientist

As a data scientist, I am passionate about transforming complex data sets into meaningful insights that drive strategic decision-making. I am committed to using data to uncover new opportunities and help organizations make informed decisions.

## Responses 1

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[Ali Mtulu](https://hashnode.com/@Alitheanalyst)

[May 13, 2023](https://hashnode.com/posts/a-quick-guide-to-keys-joins-and-referential-integrity-in-sql-databases/645f5c2d0ba4d870625f7b77/comment/645f6a554824b288fcf11343)

Awesome 👍

[Humphrey Kinoti](https://hashnode.com/@HumphreyKn)

[May 13, 2023](https://hashnode.com/posts/a-quick-guide-to-keys-joins-and-referential-integrity-in-sql-databases/645f5c2d0ba4d870625f7b77/comment/645f6a554824b288fcf11343#reply-645f6b744824b288fcf1137b)

Thanks brother